JPS6476830A - Infrared refractometer - Google Patents

Infrared refractometer

Info

Publication number
JPS6476830A
JPS6476830A JP63205924A JP20592488A JPS6476830A JP S6476830 A JPS6476830 A JP S6476830A JP 63205924 A JP63205924 A JP 63205924A JP 20592488 A JP20592488 A JP 20592488A JP S6476830 A JPS6476830 A JP S6476830A
Authority
JP
Japan
Prior art keywords
image
refractive power
target
eye
measured value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP63205924A
Other languages
Japanese (ja)
Other versions
JPH027651B2 (en
Inventor
Shinji Wada
Ikuo Kitao
Yasuo Kato
Taketoshi Ishihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Topcon Corp
Original Assignee
Topcon Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Topcon Corp filed Critical Topcon Corp
Priority to JP63205924A priority Critical patent/JPS6476830A/en
Publication of JPS6476830A publication Critical patent/JPS6476830A/en
Publication of JPH027651B2 publication Critical patent/JPH027651B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To perform the monitoring of the state of an eye to be examined during measurement and the checking and confirmation of a measured value of refractive power on the same monitor picture and to easily perform measuring operation, by also using a monitor display part for displaying the image of an anterior part as the display part of the measured value of refractive power and displaying the image of the anterior part and the measured value of refractive power on the same picture. CONSTITUTION:The target image projected on the retina by a projection optical system is correctly formed when an eye 13 to be examined has the refractive power of emmetropia. When the eye 13 to be examined is short sight or long sight, for example, the target image generates a crack. In this case, when a target 7 is moved along a projection optical axis 5 so as to obtain a correct image forming state, the position of the target at that time is displayed in the form of corrected power on a scale 27 and this corrected power is projected on an imaging tube 36 by a scale projected system. In the examination of astigmatism, the target image is observed while an image rotary element 14 is rotated and the angle of an astigmatic axis is detected. The astigmatic axis at this time is displayed by an angle scale.
JP63205924A 1988-08-19 1988-08-19 Infrared refractometer Granted JPS6476830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63205924A JPS6476830A (en) 1988-08-19 1988-08-19 Infrared refractometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63205924A JPS6476830A (en) 1988-08-19 1988-08-19 Infrared refractometer

Publications (2)

Publication Number Publication Date
JPS6476830A true JPS6476830A (en) 1989-03-22
JPH027651B2 JPH027651B2 (en) 1990-02-20

Family

ID=16514995

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63205924A Granted JPS6476830A (en) 1988-08-19 1988-08-19 Infrared refractometer

Country Status (1)

Country Link
JP (1) JPS6476830A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019216816A (en) * 2018-06-15 2019-12-26 株式会社トプコン Ophthalmologic apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51330A (en) * 1974-06-19 1976-01-06 Canon Kk
JPS519815A (en) * 1974-07-16 1976-01-26 Canon Kk
US4019813A (en) * 1976-01-19 1977-04-26 Baylor College Of Medicine Optical apparatus for obtaining measurements of portions of the eye
JPS5434592A (en) * 1977-08-24 1979-03-14 Tokyo Optical Infrared ray refractometer
JPS5542624A (en) * 1978-09-20 1980-03-26 Canon Kk Automatic eye refraction measuring system
JPS60148538A (en) * 1984-01-13 1985-08-05 キヤノン株式会社 Display selection method of eye refraction force

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51330A (en) * 1974-06-19 1976-01-06 Canon Kk
JPS519815A (en) * 1974-07-16 1976-01-26 Canon Kk
US4019813A (en) * 1976-01-19 1977-04-26 Baylor College Of Medicine Optical apparatus for obtaining measurements of portions of the eye
JPS5434592A (en) * 1977-08-24 1979-03-14 Tokyo Optical Infrared ray refractometer
JPS5542624A (en) * 1978-09-20 1980-03-26 Canon Kk Automatic eye refraction measuring system
JPS60148538A (en) * 1984-01-13 1985-08-05 キヤノン株式会社 Display selection method of eye refraction force

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019216816A (en) * 2018-06-15 2019-12-26 株式会社トプコン Ophthalmologic apparatus

Also Published As

Publication number Publication date
JPH027651B2 (en) 1990-02-20

Similar Documents

Publication Publication Date Title
US3524702A (en) Apparatus for objectively and automatically refracting the eye
CN101322643B (en) Instrument for measuring a refractive power
US5502519A (en) Optometric apparatus
JPH04200436A (en) Ophthamologic apparatus
US7357506B2 (en) Eye refractive power measurement apparatus
JPH0910178A (en) Ophthalmologic apparatus
US4529280A (en) Apparatus for subjectively measuring the refractive power of an eye
JPH0477568B2 (en)
JPS6476830A (en) Infrared refractometer
JPS624966B2 (en)
JPH04253836A (en) Ophthalmologic measuring apparatus
JPH0316131B2 (en)
JP2911452B2 (en) Ophthalmic equipment
JPH0634779B2 (en) Eye measuring device
JPH04285526A (en) Perimeter
US3588234A (en) Optical device for moving a luminous target across the eyes
JPH02185228A (en) Eye refracting power meter
JPH01119229A (en) Eye refractometer
JPH01198527A (en) Apparatus for measuring refractivity of eye
JPS59156323A (en) Apparatus for measuring near point distance of eye
JP2019062936A (en) Ophthalmologic apparatus
CN107874738B (en) Cornea diameter optical measuring device
JPH0571247B2 (en)
JP3029844B2 (en) Ophthalmic equipment
JP3633096B2 (en) Handheld ophthalmic equipment